AAT4680
Electronic Resettable Fuse
General Description
The AAT4680 Electronic Resettable Fuse is part of
the AnalogicTech Application Specific Power MOS-
FET (ASPM鈩? line of products. It is a 1A current
limited P-channel MOSFET power device that
remains fully enhanced as long as the input power
supply is above an under voltage lockout thresh-
old, and the load is below the current limit setting.
If the load increases above the current limit setting,
as is the case during a short circuit, the MOSFET
effectively becomes a constant current source
equal to the current limit. If the current limit condi-
tion persists long enough to heat the MOSFET to
an extreme temperature, the device will thermal
cycle off and on until the current limit condition is
removed. An open drain FAULT flag signals an
over current or over temperature condition.
Quiescent current is typically a low 10碌A(chǔ).
The AAT4680 is available in a 5-pin SOT-23, spec-
ified over a -40 to 85擄C temperature range.
Features
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SmartSwitch
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500mA steady state load current
600mA minimum current limit trip point
Low quiescent current, typically 10碌A(chǔ)
Over temperature protection
Fast transient response:
鈥?< 1碌s response to short circuit
400m鈩?typical R
DS(ON)
Undervoltage Lockout
Temp range -40 to 85擄C
FAULT flag with 3ms blanking
5-pin SOT23 package
Preliminary Information
Applications
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USB ports
Peripheral ports
Desktop PCs
Cell phone ports
Typical Application
5
INPUT
IN
OUT
1
OUT
FAULT
C
OUT
1碌F
AAT4680
FAULT
C
IN
1碌F
GND
2
3
GND
GND
4680.2001.11.0.91
1
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